Evidence of Enhanced Conjugation in ortho-Arylene Ethynylenes with Transition Metal Coordination
| Autor: | Jon S. Sauer, Leah M. Doyle, Cassandra E. Baumgart, Steven J. Long, Eric A. Terrell, Michael T. Everard, Jason S. D’Acchioli, Nathan P. Bowling, Robert W. Wagie, Joshua M. Wieting, Cole G. Reedy, Qianwei Ren, Jake P. Asplin |
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| Rok vydání: | 2012 |
| Předmět: |
Silver
Molecular Structure Pyrazine Pyridines Organic Chemistry Arylene Electron delocalization Conjugated system Photochemistry Metal chemistry.chemical_compound chemistry Transition metal Alkynes Pyrazines visual_art Pyridine Bathochromic shift Organometallic Compounds visual_art.visual_art_medium Palladium |
| Zdroj: | The Journal of Organic Chemistry. 77:2571-2577 |
| ISSN: | 1520-6904 0022-3263 |
| DOI: | 10.1021/jo300034h |
| Popis: | The effective conjugation of ortho and ortho-alt-para-arylene ethynylenes, with appropriately positioned pyridine and pyrazine heterocycles, increases upon binding to Ag(I) and Pd(II) cations. Significant bathochromic shifts in the electronic spectra, witnessed upon introduction of these metal bridges, are consistent with enhanced electron delocalization in the unsaturated backbone. Control studies suggest that this electronic behavior is attributable exclusively (in the case of Ag(I)) or partially (in the case of Pd(II)) to conformational restrictions of the conjugated backbones. |
| Databáze: | OpenAIRE |
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